Patent Grant
7252047
1. Field of the Invention
The present invention relates generally to boats and, more specifically, to an adjustable wake-forming apparatus attachable to a boat stern providing means for generating waves of a particular form for water sport activities. The attachment is comprised of a pair of blades fastened to the transom by a plurality of struts. The present invention provides for the use of the wave maker on boats having either an inboard or outboard engine.
Each of the provided designs places the blades in a spaced away relationship to the engine propeller. Operatively, the blades have a top edge and curvilinearly diverging bottom edge with anterior and posterior ends linearly skewed causing a plow-like movement through the water.
The inboard engine design of the wavemaker is comprised of anteriorly hinged blades with struts serving as means for attachment to the boat stern, as well as means for effecting a wave form. A posteriorly fixed strut extends between the blades whereby the fore to aft blade skew angle can be varied. Extending from the opposing boat stern sides is a pair of struts, one over the other with the top ones incorporating means for varying the length while the bottom ones having a fixed length provide means for changing the blade pitch. Also extending between the boat stern and anterior blade top is a strut also incorporating length adjusting means whereby the blade depth can be changed.
The outboard engine wavemaker design is comprised of blades positioned on each side of the engine with struts serving as means for attachment, as well as means for effecting a wave form. A posteriorly fixed strut extends between the blades whereby the fore and aft blade skew angle can be varied. Mounted on opposing boat stern sides is a bracket having a threaded post with a pair of struts of fixed length mounted thereon, one over the other providing means for adjusting the depth of the blade relative to the water.
2. Description of the Prior Art
There are other devices designed for effecting a wave pattern. Typical of these is U.S. Pat. No. 818,887 issued to Hoeglauer on Apr. 24, 1906.
Another patent was issued to Bosnich on Apr. 28, 1970 as U.S. Pat. No. 3,508,511. Yet another U.S. Pat. No. 3,670,685 was issued to Milessa on Jun. 20, 1972 and still yet another was issued on Nov. 12, 1974 to Kaufer as U.S. Pat. No. 3,847,104.
Another patent was issued to Wordell, Sr. on Feb. 22, 1977 as U.S. Pat. No. 4,008,677. Yet another U.S. Pat. No. 4,057,027 was issued to Foster on Nov. 8, 1977. Another was issued to Hark on Sep. 27, 1983 as U.S. Pat. No. 4,406,162 and still yet another was issued on Apr. 17, 1984 to Arena as U.S. Pat. No. 4,443,202.
Another patent was issued to Foster on Nov. 19, 1985 as U.S. Pat. No. 4,553,945. Yet another U.S. Pat. No. 5,988,092 was issued to Price on Nov. 23, 1999. Another was issued to Buswell on Jul. 23, 1969 as U.K. Patent No. GB1,159,269 and still yet another was issued on Jul. 8, 1981 to Hark as U.K. Patent No. GB1592451. Another was issued to Buzzi, et al. on Mar. 12, 1980 as U.K. Patent No. GB2028746 and still yet another was issued on May 21, 1980 to Levi as U.K. Patent No. GB2033324.
The combination, with a bathtub, of means acting from opposite ends thereof directly upon the water therein to cause a bodily longitudinal movement of the water in opposite directions.
An auxiliary stabilizing system for unpowered vessels comprising at least one vane (2, 2″) attached to the vessel and located adjacent the vessel's bottom (3), said vane being a curved sheet of shape-holding material having an undulating horizontal cross-section forming generally an “S-curve” to define two vertically extending chambers, the first (4) opening toward one side of said vessel, and the second (4′) opening toward the other side, whereby said vessel resists any sideward drift or leeway.
A vessel rudder consisting of a woven plastic water deflecting plate of a substantially trapezoid shape tensionally supported by a vertical slotted rod which is positioned in the center plane of the vessel's stern. A rudder stock is also positioned in the center plane. But aft of the vertical slotted rod a distance approximately equal to one fourth of the rudder plate's total maximum length. There is also fixed on the aft side another slotted rod supporting the back end of the woven plastic plate. And by turning the rudder stock plate it assumes a longitudinally curved shape for deflecting the water sideways.
A single blade stern rudder having divergent side wall surfaces near the trailing edge to provide the part of the rudder blade of maximum cross-sectional width near the rudder trailing edge and remote from the rudder pivot axis. Such a rudder may be of the partly balanced type without a stationary stern post and may have a divergent-convergent cross-section away from the said divergent side wall surface region.
A transom mounted retractible rudder for sailboats or other small vessels. A rudder blade is pivotally mounted on a lower portion of a rudder stock. By means of a handle located adjacent the stern of the boat and connected through a linkage to the rudder blade, a crew member can raise and lower the rudder blade between a fully retracted position and a fully extended position. The handle and a dial on the rudder stock cooperate to provide an indication of the attitude and depth of the rudder blade at any given time.
A vee bottom boat having one or two inboard engines with the drive shafts thereof extending through the hull to position a propeller in a position such that when the boat is planing at cruising speed the propeller will be surface-running or operating in half-submerged condition. A rudder is located directly in rear of the propeller. A partly cylindrical splash guard is provided over the propeller and prevents “rooster-tailing.” In addition, a water supply duct having a radius approximating that of the propeller is provided extending forwardly a short distance from the propeller. A transmission connecting the engine to a propeller shaft includes a chain which permits advantageous location of the propeller shaft relative to the engine and its output shaft.
An apparatus for creating surface waves in a body of liquid is disclosed which comprises a liquid displacer, a motor and a linear actuator for imparting movement to the displacer, and a level sensing device cooperating with the liquid displacer to control liquid level through control of wave generation. The present apparatus is able to adjust liquid activity to accommodate extraneous wave patterns, and to thereby more accurately control the exact wave patterns generated. The present apparatus is useful for performing wave testing to simulate aquatic conditions for ships, oil rigs and harbor installations.
A unitary assembly (10) for mounting a surface propeller (52) on the transom (T) of a boat hull (H). The assembly comprises a plate (12) for attachment to the hull (H); a prop shaft support (16) fixed to the plate (12) for juxtaposition against the transom (T); and, a rudder support arm (20) fixed to the plate (12) and extending rearwardly therefrom above and in spaced relationship to the shaft support (16). As a result of its unitary construction, the assembly provides for ready attachment of a surface prop to a hull without major hull modification or the necessity of aligning separate shaft bearing supports and rudder elements. In its preferred embodiment, the assembly also includes a propeller hood supported by the arm and a spray deflector at the aft end of the hood.
A safety shroud for attachment to the rear surface of the transom of an unmodified boat hull equipped with an inboard engine and a propeller tube and shaft rigidly fixed to the engine and extending with clearance through an enlarged opening in the transom, and a propeller on the shaft; the shroud being longitudinally and transversely downward concave to overlie the top and partly enclose the sides of the propeller, the shroud in longitudinal section being upwardly and rearwardly curved from the forward bottom edge of the shroud to just ahead of the propeller zone and then extending straight rearwardly. The lateral edges of the shroud extend generally upwardly and rearwardly from the forward bottom edge of the shroud to merge with the top rear edge thereof. Preferably the shroud is composed of inner and outer interconnected plastic shells, the outer shell having a downward concave reinforcing strut, closed at its bottom by the inner shell, and having a metal rudder support shaft therein. The shroud and boat together constitute a new and improved combination.
The vessel of this invention has a relatively uniform weight distribution throughout the length of the vessel which maintains a level trim under all operation conditions thereby maximizing the efficiency of the design and operation. This is, in part, accomplished by locating the engine and major transmission drive components inboard of the boat rather than outboard astern, and by locating the operator and the rudder assembly at the bow of the boat. Unique features of the invention include the propulsion and steering systems for a boat consisting of a paddle wheel, a power supply, a clutch, a gear reduction system to transfer and reverse power to the paddle wheel, an optional splash guard mounted between the stern of the boat and the paddle wheel, a frame to attach the propulsion members to the boat and a rudder assembly mounted to the bow of the boat. The paddle wheel can include blades to effect vertical lift secured to angled spokes at an angle radially, inclined or skewed to the axis of rotation of the paddle wheel rather than extending radially from the axis of rotation of the center hubs. The steering system includes the rudder assembly mounted at the bow of the boat and being formed and arranged to pivot freely about a horizontal axis in a vertical direction as well as having a rudder blade which pivots about a vertical axis.
The invention relates to apparatus for simulating water skiing by establishing a fast-moving fluid surface under a stationary water-skier. As shown, the apparatus comprises a tank 1 to which water is delivered both upwardly and horizontally by pumps 12, 13 and a distributor pipe 15. The water passes over a weir 7 at the other end of the tank and is returned to the pumps via passage 10. The skier holds on to a conventional tow rope secured to a fixed anchorage at or beyond the end of the tank. The tank may be charged with water containing entrained air.
Disclosed is an apparatus for creating surface waves in a body of liquid, comprising a liquid displacer, means for moving the liquid displacer back and forth to create the waves in the body of liquid, and means for sensing the level of the body of liquid, for producing a signal representative of the level of the liquid in the region of the displacer and for controlling the means for moving the liquid displacer in dependence upon said signal so as to cause reflected waves to be dissipated at or absorbed by the displacer.
A drive for a watercraft comprises a surface propeller 8 which is driven by an inboard motor by way of a shaft assembly which extends through the transom 28 and is jointed at least in the region of the transom; the outboard propeller shaft is journalled in a support arm 2 with a forward flange plate 27, fitted to the transom on the outboard side, such that the propeller thrust is transferred directly from a propeller thrust bearing in the support arm to the watercraft. The support arm 2 is a one-piece structure in the form of box sections 3, 4 which in addition to the propeller shaft bearings also house connections for cooling water lines, the exhaust gas duct, and operating elements for a steering rudder 31 fitted aft of the propeller, and also carries a trimming rudder 38 which can be swiveled about a horizontal axis. A change-over and/or reversing gear can be provided inside the watercraft, or between the transom and support arm, or inside the support arm.
A drive unit for a water craft includes a surface propeller (25) and can be affixed to the transom of a craft of conventional design with the propeller shaft (22) inclined at an angle of no more than 10 DEG with the running lines of the craft and the propeller aft of the transom by between 5% and 15% of the overall length of the craft. The unit may include single or double tunnel rudders and may support an engine driving the propeller shaft.
While these devices may be suitable for the purposes for which they were designed, they would not be as suitable for the purposes of the present invention, as hereinafter described.
A primary object of the present invention is to provide means for generating a desired wave form behind a boat.
Another object of the present invention is to provide means for varying the wave form behind said boat
Yet another object of the present invention is to provide means for attaching said wave forming apparatus to a boat having an inboard or out board engine.
Still yet another object of the present invention is to provide a wave forming device comprised of divergent curvilinear blades.
Another object of the present invention is to provide a wave forming device having struts extending from the boat stern to the wave forming device.
Yet another object of the present invention is to provide a wave forming device that is pitch adjustable.
Still yet another object of the present invention is to provide a wave forming device that is vertically adjustable.
Additional objects of the present invention will appear as the description proceeds.
The present invention overcomes the shortcomings of the prior art by providing an adjustable wave-forming apparatus attachable to a boat stern providing means for generating waves of a particular form for water sport activities.
The foregoing and other objects and advantages will appear from the description to follow. In the description reference is made to the accompanying drawings, which forms a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments will be described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the invention. In the accompanying drawings, like reference characters designate the same or similar parts throughout the several views.
The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is best defined by the appended claims.
In order that the invention may be more fully understood, it will now be described, by way of example, with reference to the accompanying drawing in which:
Turning now descriptively to the drawings, in which similar reference characters denote similar elements throughout the several views, the figures illustrate the Wave-Forming Apparatus of the present invention of the present invention. With regard to the reference numerals used, the following numbering is used throughout the various drawing figures.
The following discussion describes in detail one embodiment of the invention (and several variations of that embodiment). This discussion should not be construed, however, as limiting the invention to those particular embodiments, practitioners skilled in the art will recognize numerous other embodiments as well. For definition of the complete scope of the invention, the reader is directed to appended claims.
It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claims, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
What is claimed is new and desired to be protected by letters patent is set forth in the appended claims.
| Number | Name | Date | Kind |
|---|---|---|---|
| 818887 | Hoeglauer | Apr 1906 | A |
| 3508511 | Bosnich | Apr 1970 | A |
| 3670685 | Milessa | Jun 1972 | A |
| 3847104 | Kaufer | Nov 1974 | A |
| 4008677 | Wordell, Sr. | Feb 1977 | A |
| 4057027 | Foster | Nov 1977 | A |
| 4406162 | Hark | Sep 1983 | A |
| 4443202 | Arena | Apr 1984 | A |
| 4553945 | Foster | Nov 1985 | A |
| 5664910 | Lochtefeld et al. | Sep 1997 | A |
| 5860766 | Lochtefeld et al. | Jan 1999 | A |
| 5988092 | Price | Nov 1999 | A |
| 6047657 | Cox | Apr 2000 | A |
| 6105527 | Lochtefeld et al. | Aug 2000 | A |
| Number | Date | Country |
|---|---|---|
| 1.159.269 | May 1967 | GB |
| 1.592.451 | Jul 1977 | GB |
| 2.028.746 | Mar 1980 | GB |
| 2.033.324 | May 1980 | GB |
